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Quality Welded Stainless Steel Square Tube Structural ERW Hollow Section For Frames Railings factory
Quality Welded Stainless Steel Square Tube Structural ERW Hollow Section For Frames Railings factory

Welded Stainless Steel Square Tube Structural ERW Hollow Section For Frames Railings

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

Welded Stainless Steel Square Tube
Product Summary
Welded stainless steel square tube is a hollow structural section with four equal sides, manufactured by forming a flat strip into a tube shape and welding the seam along its length. Our welded square tubes are produced using high-frequency electric resistance welding (ERW) or TIG welding processes. ...

Product Details

Highlight:

Welded Stainless Steel Square Tube

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Railings Stainless Steel Square Tube

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Structural ERW Hollow Section
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

Welded stainless steel square tube is a hollow structural section with four equal sides, manufactured by forming a flat strip into a tube shape and welding the seam along its length.

Our welded square tubes are produced using high-frequency electric resistance welding (ERW) or TIG welding processes. They offer excellent dimensional accuracy, consistent wall thickness, and a cost-effective solution for structural and mechanical applications.

Product Specifications
Parameter Details
Standard ASTM A554, A312, EN 10296, JIS G3446, GB/T 12770
Grades 201, 304, 304L, 316, 316L
Size (Width x Width) 10 mm x 10 mm – 200 mm x 200 mm
Wall Thickness 0.8 mm – 6.0 mm
Length 3000 mm, 4000 mm, 6000 mm (custom cut available)
Welding Process ERW (Electric Resistance Welded), TIG (Tungsten Inert Gas)
Surface Finish Mill finish, Pickled, Polished (No.4, BA, Mirror), Brushed
Chemical Composition (Reference %)
Element Grade 304 Grade 316 Grade 201
Carbon (C) ≤ 0.08 ≤ 0.08 ≤ 0.15
Silicon (Si) ≤ 1.00 ≤ 1.00 ≤ 1.00
Manganese (Mn) ≤ 2.00 ≤ 2.00 5.5 – 7.5
Phosphorus (P) ≤ 0.045 ≤ 0.045 ≤ 0.050
Sulfur (S) ≤ 0.030 ≤ 0.030 ≤ 0.030
Chromium (Cr) 18.0 – 20.0 16.0 – 18.0 16.0 – 18.0
Nickel (Ni) 8.0 – 10.5 10.0 – 14.0 3.5 – 5.5
Molybdenum (Mo) — 2.0 – 3.0 —
Mechanical Properties
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%)
304 ≥ 515 ≥ 205 ≥ 35
316 ≥ 515 ≥ 205 ≥ 35
201 ≥ 620 ≥ 310 ≥ 30

Note: The values above are for reference only. Please refer to the mill test certificate for actual data.

Key Features

  • Consistent wall thickness and dimensional accuracy

  • Smooth internal and external surfaces

  • Cost effective compared to seamless tubing

  • Available in long continuous lengths

  • Excellent weldability for fabrication

  • Good corrosion resistance

Welded vs. Seamless Comparison
Feature Welded Tube Seamless Tube
Manufacturing Formed from strip and welded Extruded from solid billet
Wall Thickness Consistency Very consistent Less consistent
Length Availability Longer lengths available Shorter lengths typical
Cost Lower Higher
Lead Time Shorter Longer
Pressure Rating Good for mechanical use Higher for pressure vessels
Best For Structural, architectural, mechanical High pressure, critical applications
Applications

Welded stainless steel square tube is widely used across many industries:

Structural & Architectural

  • Handrails and guardrails

  • Building frames and canopies

  • Support columns

  • Staircase railings

  • Window and door frames

Industrial

  • Conveyor system frames

  • Machine guards and enclosures

  • Equipment supports

  • Workbenches and shelving

  • Material handling equipment

Commercial & Decorative

  • Furniture frames (tables, chairs, shelving)

  • Display racks and stands

  • Store fixtures

  • Signage frames

  • Retail displays

Transportation

  • Truck and trailer frames

  • Bus handrails

  • RV and camper structures

  • Luggage racks

Contact Us

For quotes, samples, or technical support, please reach out.

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